<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
</head>
<body>
    
<script>

var price = 10 ;
var num = 20;


document.body.innerHTML = `总价是：${price*num}`


function abc(){
    return "今天天才好"
}

document.body.innerHTML = `今天的看法:${abc()}`


</script>


</body>
</html>